DaaDaa
Set the controls for the heart of the pun
If you happen to have a pictures of the innards on this pre, I would love to see it. because I was not able to find any pictures.
FX Audio 6j1 tube preamp - a $31 wonder
- Thread starter Poultrygeist
- Start date
wushuliu
Super Member
You should be able to find a bunch, just google and go to images. The pre uses a dc buck converter, i think that helps with better voltage regulation and lack of hum. Probably generates some noise but evidently not enough to be noticeable. Probably also why an astron isn’t noticeably better than pyramid, but swapping caps should be a mild upgrade.
hifix
Active Member
I've given in to peer pressure. 
email says "order confirmed".
Now my linear supply has renewed purpose!
Just wondering - what amplifier gain setting are you guys using with FX Audio pre ?
[Edit]... do these circuits need heaps of hours on them before it all comes good ?
email says "order confirmed".
Now my linear supply has renewed purpose!
Just wondering - what amplifier gain setting are you guys using with FX Audio pre ?
I'm a tube noob. Poultry, is there a reputable online retailer for these tubes ?
[Edit]... do these circuits need heaps of hours on them before it all comes good ?
Last edited:
Poultrygeist
Lunatic Member
I buy vintage ( not new ) tubes from eBay sellers with high feedback scores. They're usually cheaper than from dealers and you have recourse with eBay. You don't have to buy NOS ( new old stock ) tubes which can be pricey. Used vintage preamp tubes that test good can last a lifetime and they don't require a period of burn-in.
My FX sounded great right out of the box.
My FX sounded great right out of the box.
Poultrygeist
Lunatic Member
I highly recommend a vacuum tube pin straightener for anyone getting into tubes.
hifix
Active Member
Thanks for the heads up Poultly. I am as curious about this FX audio setup as i was with the TA2020 amp that i ordered. Very much looking forward to it.
Its a good thing that the layout of the RCA sockets (inputs on the left) work for my config. The current interconnects are all solid core and trimmed to length. Should fit.
Cheers man. I'll be looking for one of those too.
-- on a different note --
Merry Christmas to everyone!
Poultrygeist
Lunatic Member
same to you and all the AKer's
john111/LZ
Lunatic Member
Merry Christmas to everyone
KlipschFan61
Smooth Jazzer
Tubestore also has great customer service.
Your call, may affect channel balance more or less if at all.
hifix
Active Member
Thanks for the heads up Pio1980,
I've got no balance controls in the system. "matched" it might need to be,
Poultrygeist
Lunatic Member
I've used matched and unmatched and found no difference in channel balance.
likebike23
Addicted Member
Merry Christmas everyone. Well I got the FX audio preamp with tone controls. It works, and sounds good. The only problem I have is that the left tube is leaning to one side. It looks like they didn't center the hole in the case and tried to compensate because if you were to lean the tube back to vertical it would hit the case. Kind of disappointed to be honest. I think I'm going to return it and try another.
Poultrygeist
Lunatic Member
I think I'd take a look inside. Maybe you can level the board inside the case. If the tube socket is crooked I would send it back.
A line level preamp has a signal gain factor, a buffer is essentially a unity (no) gain isolation stage. A buffer is useful for joining components at line level that may not work optimally directly connected together where gain is unnecessary.
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